Here’s an article from Indepenent Online that gorilla. Like many other endangered species, you see the typical culprits of poaching and habitat destruction having a negative impact on the gorilla species.
But there’s an underlying root cause that is behind the plight of the gorilla: political strife.

From the article:

“One side effect of the conflict has been the devastating impact on the region’s gorillas. Refugees unable to grow enough crops to feed themselves have been forced to kill gorillas and other large mammals in order to survive. Conservationists have not only been powerless to protect the animals, with surveys of the remaining gorilla population and other preservation work proving impossible, but several workers have been killed after they were caught up in militia fighting.”

The article suggest within the next few decades, the entire gorilla population will be extinct. The number of gorillas across all species worldwide is currently only in the thousands.
Here’s a link to the article:
http://news.independent.co.uk/environment/article1180234.ece